Vernon Islands Blue Holes consists of a series of submerged blue holes located off the Darwin Coast. This site is suitable for intermediate divers and requires boat access. The area is defined by massive tidal movements that can generate strong currents and horizontal waterfalls, making neap tides the preferred time for diving. A thermocline is present, with cooler water found at depth within the holes. The habitat supports a variety of reef fish and invertebrates typical of the Northern Territory region. Due to significant environmental hazards, including saltwater crocodiles and box jellyfish, local guidance is essential for navigating these remote waters.

The Vernon Islands, located off the Darwin Coast, offer a challenging environment featuring both reef systems and blue holes. Depths range from the shallows down to 60 metres, requiring intermediate to advanced skill levels. The area is defined by significant tidal variations and strong currents, which can create horizontal waterfalls at low tide. Divers must navigate these conditions, and timing dives around slack water is essential. Visibility typically ranges between 10 and 25 metres. Due to the presence of crocodiles, dangerous jellyfish, and strong currents, diving with experienced local operators is required. A full exposure suit is recommended for protection against stingers.

Vernon Islands Blue Holes are a series of blue hole structures located off the Darwin Coast. The site features a reef environment that drops from the shallows to depths of 60 metres. Due to the location, the area is subject to strong tidal races, eddies, and upwellings, with currents reaching 2.5 knots. Visibility typically ranges between 15 and 25 metres. Water temperatures are warm, ranging from 26C to 31C throughout the year. Access is strictly by boat, and the site is suited for advanced divers and snorkellers. Hazards include strong currents, potential for decompression, and the presence of box jellyfish and saltwater crocodiles.

Vernon Islands Blue Holes are a series of reef structures and blue holes located off the Darwin Coast. This site is defined by massive tidal movements that create horizontal waterfalls over the reef flats. Diving and snorkelling are restricted to slack tide during neap tides due to strong currents. Depths range from 5 to 40 metres, with a thermocline present where deeper water is noticeably cooler than the surface. Access is by boat only, and the site is suited for intermediate divers experienced in drift conditions. Saltwater crocodiles are a potential hazard in these coastal waters. Conditions are most reliable between May and October.